解: 增广矩阵 =
1 2 3 4
3 5 7 9
5 8 11 14
r2-3r1,r3-5r1
1 2 3 4
0 -1 -2 -3
0 -2 -4 -6
r1+2r2,r3-2r2, r2*(-1)
1 0 -1 -2
0 1 2 3
0 0 0 0
所以方程组的全部解为: (-2,3,0)'+c(1,-2,1)'
解: 增广矩阵 =
1 2 3 4
3 5 7 9
5 8 11 14
r2-3r1,r3-5r1
1 2 3 4
0 -1 -2 -3
0 -2 -4 -6
r1+2r2,r3-2r2, r2*(-1)
1 0 -1 -2
0 1 2 3
0 0 0 0
所以方程组的全部解为: (-2,3,0)'+c(1,-2,1)'